These are the eggs of Spyro and Cynder's children. The reason they are shown in various sizes is because it represents the age difference between all of them (two of them are twins). Here's the names listed (left to right):

Pretty cute eggs, i love the shapes and colors as well as the names you chose for each of them!! As for the twins you can cover Leila's back with Spyro's golden crest and add Cynder's tail blade on the tip of her tail. As for her horns you can add Spyro's horn as the main horn and Cynder's as the secondary set of horns.